The plants are looking happy happy happy. The t5 bulbs will need there own fixture, they are different. when you buy them get around 6500k for veg. Is your room sealed or is ventilated? How is the air conditioner installed? Just curious you said you had an extra fan for an intake to help heat and it looks like a bare bulb room with an a/c inside. I would plug the a/c into an outlet of it own and just set a temp and let it on all the time. i would recommend taping up any lighting on it once you got it set where you want it. Is the sentinel controller for the whole room, can you plug everything into it for your enviroment? how are you exhausting the heat from the a/c?
looking much better man!
the bottom plants are getting too tall for a 2 tier setup, the bottom plants will just stretch past and block the top row plants. i'm doing 1 level now because i let mine veg a bit long.
is putting the can filter on the ceiling an option?
muffin fans? when properly placed i can put my hand within a couple inches of a 1k and its just warm. will help make sure top colas never get burned post stretch.
racks look good, i like the stands. pondliner and a lil incline works perfectly.. just make sure there is room for water to flow all the way from the last pot to the drain, sometimes a pot would get nudged in just the right way to block the path and water would build up til i realized the drainage pump was sounding weird...
i like the use of plywood as sides for the pondliner too... shades and staples were not very secure in my room.